Discussed is the development and psychometric analysis of a measure of rape-supportive attitudes and beliefs called the Rape Attitudes and Beliefs Scale (RABS), intended for the use with college men. Items were developed from a literature review of "rape myths" that were correlated to some measure of sexual aggression. An exploratory factor analysis using only male participants revealed five factors: a) justifications for sexual aggression based on women's behavior, b) belief that women should hold more responsibility for sexual assault, peer c) pressure/need for sexual status and misreading women's sexual intent, d) acceptance of the use of alcohol and coercive tactics to acquire sexual compliance, and e) dislike for the feminine and acceptance of traditional gender roles. Initial reliability and validity studies were favorable for the RABS, including evidence that these factors were positively related to measures of sexual aggression. Each factor demonstrated differential power to predict sexual aggression, with justifications being the most powerful. Implications for counseling and education are discussed. (Contains 3 tables.)